Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 125mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ40 mm
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S
Where a stroke only needs nudging a few millimetres, the MACJ40X125-10S keeps it simple: a 10 mm adjustable window lets maintenance crews pull the extend stop back within 115-125 mm without re-plumbing. It is double-acting with variable air cushioning at both ends, pushing 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa.
Like every MACJ, the barrel is stainless steel rolled onto aluminium-alloy covers, and the 16 mm rod is hard-chrome plated carbon steel, a combination that shrugs off moisture better than painted minis in food or outdoor corners. The built-in magnet is standard equipment, so CMSG, DMSG or EMSG switches mount straight on. For sizing, treat near 377 N as the practical working force at 0.5 MPa, which also translates to roughly 32 kg lifted vertically with a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -10 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
| CA / U / CM | Back-cover type: CA pivot, U flat-end, CM round-end. |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S Is Used
Laboratory sample press
A benchtop vial-capping press uses the 10 mm window to fine-tune cap seating depth on 30 ml reagent bottles, with 628 N available so the soft-stop setting stays precise run after run.
Textile take-up arm
On a fabric winding frame the cylinder tensions the take-up roller; the final 10 mm of extend stroke is trimmable, so operators compensate for roller wear during changeover.
Switch-indexed presence check
A DMSG switch flags full extension on an automotive bracket gauge, confirming the part seated before the robot approaches; the trim window locks the checking depth mechanically.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S the Right Cylinder?
Between bore 25 at 245.3 N push (0.5 MPa) and bore 50 at 981.3 N, the 40 mm bore covers mid-duty automation without eating panel space. Ports are 1/8" whichever thread you pick - PT blank, G or NPT - and the 16 mm rod carries an M12x1.25 male thread. Remember the adjuster is a positional end stop, not a brake: with air off, the piston can still be pushed along. Choose FA or LB mounting and match I or Y knuckles to your linkages.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-10S FAQ
Bore 40 gives 628.3 N push and 527.8 N pull at 0.5 MPa, rising to 879.6 N push and 738.9 N pull at 0.7 MPa; the theoretical maximum is 128.1 kgf at 1.0 MPa. Pressure range is 0.15-1.0 MPa (22-145 psi) with speeds of 30-800 mm/s.
The MACJ's stainless round tube and 20 um hard-chrome plated rod resist corrosion in wet, washed-down or outdoor spots where painted mini cylinders rust and jam. The aluminium covers are riveted onto the barrel for a sealed body, and the 1/8" ports accept PT, G or NPT fittings on this 40 mm bore.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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